(A) What is pollution-free vegetables

Pollution-free vegetables refer to vegetables that are not polluted by harmful substances, and some are called green vegetables or clean vegetables. In fact, commercial vegetables do not contain toxic substances, or the content of toxic substances is controlled within the allowable range, that is, pesticide residues, nitrate content, "three wastes" harmful substances and pathogenic microorganisms do not exceed the standard. Those that meet the above standards can be called pollution-free vegetables.

With the development of science and technology and the improvement of people's living standards, the production and supply of pollution-free vegetables and green food have attracted much attention in China today. In vegetable production, people's understanding of the ecological environment has been deepened and improved. It is generally noted that nitrate in industrial pollution, pesticides and fertilizers will enter the human body through the food chain, causing certain harm and even life-threatening. Because of this, people's requirements for vegetable quality are getting stricter and stricter, and the voice of producing green vegetables is getting higher and higher. The production and supply of pollution-free vegetables are highly valued by all levels and welcomed by the masses. Therefore, using scientific methods, based on ecology, environmental protection and sociology, to produce pollution-free vegetables is not only to meet the needs of urban and rural people for clean vegetable baskets, but also related to thousands of families and even future generations.

What is green food?

Green food is a kind of pollution-free, safe, high-quality and nutritious food that follows the principle of sustainable development, is produced according to a specific mode of production, and is approved by specialized agencies to use the green food logo trademark.

(3) What are pollution-free agricultural products?

Pollution-free agricultural products refer to high-quality agricultural products and primary processed products whose safety and quality meet the relevant mandatory national standards and laws and regulations.

(4) What are the similarities and differences among organic food, green food and pollution-free food?

Organic agriculture is a growth system that is completely different from or basically does not need synthetic fertilizers, pesticides, production regulators and livestock feed additives. According to the requirements of the public, the draft standard prohibits genetic engineering technology and irradiated products from being labeled as organic food. It is a pure natural and pollution-free commodity food. It is an internationally recognized environment-friendly food. Green food is a sustainable agricultural product with China characteristics, which is based on China's national conditions and combined with the world's advanced agricultural development trend. Pollution-free food contains the basic characteristics of organic and green food, and is a transitional food of green food. They are all sustainable foods with the aim of safety, environmental protection and health, and represent the development direction of China food in the future.

2. Agricultural common sense

The new semester is coming again. In this critical period, I should carefully plan every minute and devote myself to my study. A teacher once told me that attitude is everything, and I want to face learning with a good attitude. Challenge yourself and believe in yourself. Personally, I think people's life is limited and time waits for no one, because this is the last period of my junior high school career, and I will not let everyone around me go. Earn and seize every minute around you. Looking around my study career, I think the weakest subjects are Chinese and chemistry. My strengths are math and physics. Every monthly exam has scores in chemistry and Chinese. I think I should strengthen these aspects. I think the first thing to do is to listen carefully, fully digest what the teacher said in class, and synchronize my thinking with the teacher. General textbooks are the first, and the contents in the books are the foundation. On the basis of mastering, I should do it. Fill in the blanks and improve at different levels. I also need to set up a set of wrong questions, record the wrong questions and questions that I haven't understood in practice in time, and answer them one by one to form a consolidation. In reviewing, I should advocate pragmatism, pay attention to standardization and formatting, and develop a scientific and rigorous attitude, because any nonstandard answer may lead to losing points. Because my weakest subject is Chinese, my grades are average. This composition is dull and lifeless. Read more extracurricular books after class, remember 1~2 good words and sentences every day, and practice writing according to the teacher's guidance. Try to reach 95 points or above in every composition exercise. 2. Do a good job in the exam outline and the whole product topic in advance, and prepare carefully the night before yesterday. Do more in-depth and accurate questions and expand your thinking. 3. Keep reading foreign language works every day and form good habits. Strictly avoid losing points for words in the senior high school entrance examination. Carefully review and preview the key points and appendices of the whole test center, requiring you to master grammar and sentence patterns. Pay attention to study and use it flexibly. 4. Review and recite the commonly used atomic mass table, elemental valence table, acid-base salt dissolution table, and strictly avoid losing points because of forgetting in the senior high school entrance examination. Memorize and summarize the chemical equations given by the teacher carefully, require learning and flexible use, and know the reaction conditions and results. Material constants, electricity and optics are the weakest links in my physics. I will carefully consolidate my knowledge of electricity and optics according to the teacher's general review. According to the syllabus, I will carefully review all the knowledge, finish my homework on time and take notes. 6. I will carefully review the knowledge points of history according to the syllabus, strengthen my memory in the next two months, and carefully remember the formulas and tables summarized by the teacher. Using them, I can remember the knowledge points well and pay attention to what happened this year. Connect current events with middle school history. 7. Review and recite according to the outline and the topics and knowledge points on the whole product. Because the politics of the senior high school entrance examination has become very lively this year, we should not learn by rote, we should study and use it flexibly, and we should also carefully refer to the senior high school entrance examination questions in other cities. The above study plan should be carefully implemented, and success lies in action. After a period of time, you should carefully analyze and check the current situation and the plans made.

3. What are the common knowledge of agricultural science and technology?

Cultivation techniques of spring soybean

1, broadcast as early as possible. Sowing can be done when the soil temperature reaches above 12℃, but it is safer to sow above 14℃. In order to prevent rotten seeds and improve the emergence rate, early sowing with plastic film and autumn propagation of spring soybeans can be adopted. Generally, the sowing period is from "rain" to "vernal equinox" in southeast Fujian, and from "vernal equinox" to "Qingming" in northwest Fujian.

2. Reasonable close planting. In medium fertility fields, the general planting density is per mu 1.8-2. 1 10,000 plants, with two rows of 80 cm wide beds and 20 cm spacing between holes, with three seedlings per hole. The planting density with high soil fertility can be thinner, and the density of barren land can be higher.

3. Scientific fertilization. Soybean needs more fertilizer, and the ratio of nitrogen, phosphorus and potassium in the total fertilization amount of soybean is 1.8 1.2. In the field with high fertility, it is the key to prevent plants from growing white. It is necessary to increase the application of phosphorus and potassium fertilizers and limit the application of nitrogen fertilizers. On the basis of applying 25-30 kg of calcium superphosphate and 5-6 kg of potassium chloride per mu, apply nitrogen fertilizer early, and when each compound leaf is unfolded, lightly apply quick-acting nitrogen fertilizer once as seedling fertilizer, and apply 3-5 kg of ammonium sulfate per mu to the border; The flowering and pod setting period of soybean is mainly controlled, and generally no or less flower fertilizer is applied. Fertilize according to plant growth during grain filling. If there is premature aging growth, spray tail protection fertilizer combining nitrogen and phosphorus immediately.

4, intertillage drainage. Soybean is an intertillage crop, so intertillage should be carried out at the seedling stage, which can not only eliminate weeds, but also loosen the soil and create a suitable soil environment for the growth of roots and nodules. It is rainy in spring in Fujian, and the growth of root system is affected, so attention should be paid to drainage and waterlogging elimination. Generally, intertillage for 2-3 times at seedling stage, combined with topdressing. Before flowering, another intertillage should be carried out to promote root growth and prevent lodging.

5. Control pests and diseases. The main pests and diseases are aphids, cabbage caterpillar, rust and so on. Attention should be paid to timely prevention and control according to the occurrence of pests and diseases.

6, timely harvest. Harvest at the end of yellow maturity, when all plants turn yellow-brown, all stems and pods turn yellow, showing the inherent color of the variety, and the seeds are separated from the pod wall.

4. Proverbs about agriculture

Proverbs about agriculture:

1) Frost flakes and hail lines.

2) The wind blows over a large area, and the hail hits a line.

3) It rains at night and it is sunny during the day, so there is no room for food.

4) After a burst of sunshine and rain, plant yellow seedlings and eat white rice.

5) There is no rain in the rain and no rice in the valley; There is much rain and rice in the valley.

6) In dog days, bend the millet under the soaking rain.

7) It is clear and early, and early rice must be good.

8) Don't take a fan in April, and hurry to farm.

9) It's too hot to lie on the sidewalk, and only crops grow in the field.

10) People are jumping in the house and rice is laughing in the fields.

1 1) People went into the house, and rice was running in the fields.

12) People jump when it's hot, and laugh when the meal is hot.

13) people are afraid of being old and poor, and rice is afraid of cold dew.

14) meets the cold dew wind, and the harvest is empty.

15) Late rice depends on rainy days. Autumn heat harvests late-maturing fields.

16) Bitter worms in wheat can't freeze.

17) freeze broken wheat roots and hemp rope.

18) cold harvest wheat, hot harvest autumn.

19) The snow in December is half a foot thick, and the wheat is not enough.

20) Cover wheat seedlings with snowflakes and sleep with steamed bread in the coming year.

Heavy snow indicates a good year.

22) A winter snow and a fortune, a disaster in Chun Xue.

23) A quilt in the winter snow, a knife from Chun Xue.

24) Snow was like a quilt, and Chun Xue froze to death.

25) Winter snow is the quilt of wheat, and Chun Xue is the rotten root of wheat.

26) Winter snow is a quilt, and Chun Xue is a ghost.

When it snows a lot in winter, Chun Xue is useless.

28) Chun Xue filled the ditch, but Xia Tian refused to accept it.

29) Snowy water becomes a river, and the wheat is thin.

30) Welfare is violent every day, sitting at home and collecting rice.

3 1) Night rain in autumn grain is stronger than dung, and a night rain is fertilizer.

32) In autumn, harvest where it rains.

33) When it rains in early autumn, everything is harvested, and when it rains in summer, everything is gone.

34) It rains in summer and there is rice in the barn.

35) It rains in summer, and the grain basket is rotten.

36) It is not uncommon to wear a skirt and sweat, and heavy rain is not uncommon.

37) It is clear and early, and early rice must be good.

38) If you don't take a fan in April, you are in a hurry to farm.

It's too hot to lie on the sidewalk, and only crops grow in the field.

40) People are jumping in the house and rice is laughing in the fields.

4 1) You can walk to the ends of the earth in a dozen steps.

42) Three points of makeup and seven points of eyes.

43) A play must match; if it doesn't match, it must lose.

44) It rains at night and sunny during the day, so there is no place to put food.

45) A burst of sunshine and rain, planting yellow seedlings and eating white rice.

46) There is no rain in the rain and no rice in the valley; There is much rain and rice in the valley.

47) In dog days, under the soaking rain, bend the hills and millet.

48) Welfare is violent every day, sitting at home and collecting rice.

49) Autumn grain night rain is better than dung, and a night rain is fertilizer.

50) In autumn, harvest where it rains.

5 1) When it rains in early autumn, everything is harvested; when it rains in summer, everything is gone.

52) It rains in summer and there is rice in the barn.

53) It rains in summer, and the grain basket is rotten.

54) It is not uncommon to wear a skirt and sweat, and heavy rain is not uncommon. Chun Xue is a river, and everyone eats steamed bread with white flour.

55) When the seedlings are too cold, they are afraid of rotten seedlings, and when they come out of the water, they are afraid of green frost.

Farming culture refers to a kind of custom culture formed by farmers in long-term agricultural production, which focuses on agricultural services and farmers' own entertainment. Farming culture combines Confucian culture and various religious cultures, forming its own unique cultural content and characteristics. Its main body includes language, drama, folk songs, customs and various sacrificial activities. It is the most extensive cultural type in China. Agricultural civilization determines the characteristics of Chinese culture. China's culture is different from European nomadic culture, in which agriculture plays a decisive role.

5. Small knowledge of agricultural science popularization

The agricultural popular science education base is an agricultural management model that takes into account the functions of production, scientific and technological demonstration and popular science education.

Agronomy is a comprehensive subject with a wide range of specialties and rich contents. Agricultural popular science education bases are often built on the basis of agricultural scientific research bases, and little investment is made in scientific research facilities as scenic spots.

For example, the famous Yangling Agricultural City, once the birthplace of ancient agriculture in China, has now become a new science and education agricultural park integrating agricultural production, scientific and technological demonstration, scientific research and education. There are the only agricultural demonstration area at the national level, the largest insect museum in Asia, the national laboratory for simulated rainfall, the second rainfall hall in the world, the cloned sheep base with world-leading technology, Boer sheep farm, the world's best sheep breed, the famous water sports center in Asia, industrialized and efficient agricultural facilities and special animal farms, all of which are new ways of modern agricultural industrialization, attracting many tourists and some schools to carry out extracurricular activities and teach agricultural courses here. It has become a well-known "Youth Agricultural Science and Technology Activity Education Base" and a green education park in China, which fully reproduces the glory of Shennong's descendants "Land to the tiller and people to the teacher".

We have made gratifying achievements in highlighting the high-tech characteristics of agriculture and tapping demonstration and sightseeing resources. From 2000 to the end of July 2006, it received a total of 165438+ 10,000 tourists from home and abroad, and sightseeing agriculture brought 88 million yuan of new income to the local area.